FAQs

Glossary

LCD Module Details

Precautions for LCM

Frequently asked questions

How do I order LCDs from Tri-T?

Ordering from us is easy – for a quick quotation of your products, we encourage sending us as much information as possible. Please refer to the LCM Number Notation Guide to select different LCD options.

What do information do you need for Standard LCDs?

If you are ordering Standard LCDs, we require the following information:

Standard LCD Part Number

Display Type: Positive or Negative

Operating & Storage Temperature Range

Quantity of your order per order or annually

If the above matches our Standard LCDs, samples can be purchased easily for your evaluation.

What information do you need for Custom LCDs?

If you are ordering Custom LCDs,we require the following information:

Outside Dimensions of LCD

Display Type: Positive or Negative

TN or STN (If you are unsure, we can assist you)

Operating & Storage Temperature Range

Number of Metal Pins (if any)

Driving Conditions: Multiplex (Duty), Bias & Voltage

Special Needs (if any)

Quantity of your order per order or annually

In which format shall we send you our design drawings?

Please send us all design drawing in PDF format.

What happens once we place an order?

Providing you have provided us with all of the information we require (using the details in Standard or Custom LCDs), we will be able to send you a full quotation. Once you have received and approved this quotation, we then ask for a detailed design drawing or sketch – in PDF format.

Once we have received your design drawings, we will begin to produce a counter-drawing for you to approve. After we’ve received your confirmation of this drawing, we can then begin to produce your samples.

Once you have received and approved our samples, we will be ready to produce and deliver your volume order.

If at any time during this process you encounter questions, changes or difficulty, do not hesitate in getting in contact with us and our qualified engineers will be happy to help you overcome any challenges or queries you may encounter.

Precautions for Using LCM

2. The polarizer used on the display surface is easily scratched and damaged. Extreme care should be taken when handling. To clean dust or dirt off the display surface, wipe gently with cotton, or other soft material soaked with isoproply alcohol, ethyl alcohol or trichlorotriflorothane, do not use water, ketone or aromatics and never scrub hard.

3. Do not tamper in any way with the tabs on the metal frame.

4. Do not made any modification on the PCB without consulting TRI-T.

5. When mounting a LCM, make sure that the PCB is not under any stress such as bending or twisting. Elastomer contacts are very delicate and missing pixels could result from slight dislocation of any of the elements.

6. Avoid pressing on the metal bezel, otherwise the elastomer connector could be deformed and lose contact, resulting in missing pixels and also cause rainbow on the display.

7. Be careful not to touch or swallow liquid crystal that might leak from a damaged cell. Any liquid crystal adheres to skin or clothes, wash it off immediately with soap and water.

Package: SMT/COB/TAB/COG

Static Electricity Precautions:

1. CMOS-LSI is used for the module circuit; therefore operators should be grounded whenever he/she comes into contact with the module.

2. Do not touch any of the conductive parts such as the LSI pads; the copper leads on the PCB and the interface terminals with any parts of the human body.

3. Do not touch the connection terminals of the display with bare hand; it will cause disconnection or defective insulation of terminals.

4. The modules should be kept in anti-static bags or other containers resistant to static for storage.

5. Only properly grounded soldering irons should be used.

6. If an electric screwdriver is used, it should be grounded and shielded to prevent sparks.

7. The normal static prevention measures should be observed for work clothes and working benches.

8. Since dry air is inductive to static, a relative humidity of 50-60% is recommended.

Soldering Precautions:

1. Soldering should be performed only on the I/O terminals.

2. Use soldering irons with proper grounding and no leakage.

3. Soldering temperature: 340°C+5°C

4. Soldering time: 3 to 4 second.

5. Use eutectic solder with resin flux filling.

6. If flux is used, the LCD surface should be protected to avoid spattering flux.

7. Flux residue should be removed.

Operation Precautions:

1. The viewing angle can be adjusted by varying the LCD driving voltage Vo.

2. Since applied DC voltage causes electro-chemical reactions, which deteriorate the display, the applied pulse waveform should be a symmetric waveform such that no DC component remains. Be sure to use the specified operating voltage.

3. Driving voltage should be kept within specified range; excess voltage will shorten display life.

4. Response time increases with decrease in temperature.

5. Display color may be affected at temperatures above its operational range.

7. For long-term storage over 40°C is required, the relative humidity should be kept below 60%.

Limited Warranty

TRI-T modules are not consumer products, but may be incorporated by TRI-T’s customers into consumer products or components thereof, TRI-T does not warrant that its modules and components are fit for any such particular purpose.

1. The liability of TRI-T is limited to repair or replacement on the terms set forth below. TRI-T will not be responsible for any subsequent or consequential events or injury or damage to any personnel or user including third party personnel and/or user. Unless otherwise agreed in writing between TRI-T and the customer, TRI-T will only replace or repair any of its LCD which is found defective electrically or visually when inspected in accordance with TRI-T QUALITY INSPECTION STANDARD.

2. No warranty can be granted if any of the precautions state in handling liquid crystal display above has been disregarded. Broken glass, scratches on polarizer mechanical damages as well as defects that are caused accelerated environment tests are excluded from warranty.

3. In returning the LCM, they must be properly packaged; there should be detailed description of the failures or defect.

Reliability & Test Conditions

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We carry a full line of character display modules & graphical display modules that are compatible with other LCD module manufacturers giving you a fully-customisable service.